Syringe



March 24, 1931.

W. H. BROCKWAY SYRINGE Filed May 2; 19:50

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Patented Mar. 24, 1931 UNITED STATES PATENT GFFCE WILLARD' HARRIS BROCKWAY, OF NEII'EIIDHAlVI,y MASSACHUSETTS, ASSIGNOR TO MAC- GREGOR INSTRUMENT COIvIPANY, OF NEEDHAIJI, MASSACHUSETTS, A CORPORATION 0F MASSACHUSETTS SYRINGE Application filed May 2, 1930. Serial No. 449,182.

This invention relates to improvements in syringes and particularly syringes embodying a glass barrel within a metal holder or frame. It is desirable in such a holder to provide means for supporting the barrel and also for aligning its end or nipple with the syringe needle holder while avoiding any lateral strains on the nipple and relieving the glass barrel entirely from the thrust of the needle, thus preventing the liability of any lateral or longitudinal strain fracturing the glass barrel. My improvements Vare particularly adapted for use in such a syringe as that disclosed in the lVarriner patent, No. 1,529,412, March 10, 1925. In the drawings I have disclosed and in the specification described a form of my invention which has proven successful in practical use.

In the drawings:

disclosing my improved structure.

Fig. 2 is a detailed vertical cross section showing a barrel end prior to alignment of the nipple with the needle connection, the aligning mechanism being in locked position.

Fig. 3 is a similar view showing the nipple in position in the bushing, the aligning mechanism being unlocked.

Fig. 4 is a detailed plan view of my rocker washer, and

Fig. 5 is a side view of the same, and

Fig. 6 is a bottom plan view but with the nut removed.

In my present invention I employ the usual syringe holder 1 which is provided with opposite openings 2 through which the syringe barrel may be observed. At one end the holder is provided with the usual laterally projecting nger clasps 3 3 and at its lower or needle end has a square orifice 4 through which passes the connection for the barreland the needle. This connection comprise-s a bushing 5 which has a square portion 51 passing through the orifice 4v in the bottom of the holder and extending beyond said square portion 51 as a threaded portion 52 adapted to be engaged by a knurled nut 6, and beneath said portion 52 terminating as a second threaded portion 58 adapted to engage with the usual syringe needle not shown. The bushing 5 is Fig. 1 is a side elevation partly in section bored as at B throughout its upper end. The

bore B Yis adapted to receive the nipple 101 of the barrel 10 and thence extends as a passageway from the nipple to the needle (not shown) which is to be attached to the threaded end 53 or" the bushing 5.

Resting on the flange 11 of the holder 1 and encircling the square portion 51 of the bushing is a rocker washer 7 provided with oppositely disposed ridges 71 on each of its faces which permit full lateral play of the bushing 5 and tend to aid alignment of the nipple 101 in the bushing as hereinafter eX- plained.

EXternally of the barrel but encircling that part oit' the square portion 51 of the bushing 5 which extends beyond the orifice 4 is a second rocker washer 8 similar to the rocker washer 7 and provided with oppositely disposed ridges 81 on each of its faces similar to the ridges 71 on the rocker washer 7. This washer is held in place on the bushing by the knurled nut 6 above referred to. Additional ridges may be provided on these rocker washers 7 and 8 and the same may be variously arranged with regard to the barrel and bushing. In operation, after the barrel 10 has been placed within the holder l the knurled nut 6 is unscrewed in order that full play may be given to the roclrer washers 7 and 8 in order that the nipple 101 may readily be centered in the bushing 5 without any unnecessary lateral strain on the nipple. Once the nipple 101 is seated in the bushing 5 the lrnurled nut 6 may again be tightened to hold the bushing 5 and rocker washers 7 8 in rigid position with relation to the holder l. In use, the thrust of the needle is transmitted directly through the rocker washers and bushing to the holder 1 thus entirely relieving the glass pump of any lateral or longitudinal strain and avoiding the liability of fracturing the glass barrel.

Modifications will readily suggest themselves to those skilled in the art but within the scope of the present invention is claimed.

What I therefore claim and desire to se-y cure by Letters Patent is:

1. The combination of a syringe holder having a square orifice in its lower end, a barrel in said holder, a bushing loosely mounted of said bushing whereby to aid alignment of the same with said barrel comprising av pair of spaced rocker washers, one of'sa-id'w'ashers being disposed within said holder and encircling said bushing and the other of said washers encircling said bushing externally of'said holder, and means for adjustinoF said rocker washers with relation to said Ibushing.

2. The combination of a syringe holder having an orifice in its lower end, a barrel in said holder, ya bushingVin-said holder` bored to receive the nipple of said barrel, said bushing extending through said orificev and -constructed to secure a needle, means permitting the lateral play ofsa-id bushing whereby to aid alignment of the same-with said barrel comprising `rocker washers encircling said bushing, and 'means for adjusting said rocker washers with relation to said bushing.

3. The combination of a syringe holder having an orificein itsvlower end, a barrel in said holder, abushing-in said holder bored to receive the nipple-ofsaid barrel, said bushing extending through said orice and con structed to secure -a needle, means-permitting the Ilateral play of saidbushing whereby to aid'alignment offthe same with -said barrel comprising a rockerl washer and means for adjusting said rocker washerV with relation to said bushing.

4l. The" combination of al syringe holder havingan orifice in its lower end, a barrel in said holder, a lbushing in saidholderb'ored to receive Ythe nipple of said'barrel, said bushing extending-through said-orifice and constructed to securev a needle, means permitting. they lateral play of said bushing whereby to aid alignment of the-same with said barrel, said'means encirclingsaid bushing, and means for holding the same on said bushing.

5. The'combination'of a syringe holderA having an-ori-ce in itslowery end, albarrel in said holder, a `bushing in ksaid holder bored to receivev the nipple ofsaid'barrel, said bushingextending throughx saidiorifice fand constructed to secure a needle,meanspermitting the lateral playof said bushingl wherebyY to aid alignment ofthe samewith said barrel, said means encircling said bushing'within said holder, and means `for holding the same on said bushing. Y

6. The combination of a syringe holder having an orifice' in its lower end, -a'barrel said holder, a'bushingin said holder bored toreceive-the nipple oli-said barrel, said bush*- in-g extending., through said orifice and 'constructed to secure a needle, means permitting thelateral play offsaid bushing whereby to aidalignment fof the same ywith said barrel-,

said mea-ns encircling said bushing'externally of said holder, and means for holding the same on said bushing.

7. In a syringe holder having an orifice in its lower end, a bushing adapted to seat in said orifice with lateral play, and to hold a needleand thenipple ofthe barrel, and means toaid alignment of saidnipple with said bushing consisting of a rocker washer and means for adjusting said rocker washer to prevent or permit play thereof with 4relation to said bushing.` y j 8. The combination of al syringeholder adapted to engage a barrel and provided with an orifice, a bushing adapted to seatin said orifice with lateralplay in all directions and means adapted-to securersaid needle Ian'd'the nipple'of said Vpump barrel in alignment com` prising a rocker'washer and vI neans-for maintaining` the same adj acentsai'd bushing.

9. The combination of a' syringe` holder adapted to engage a barrelan-d-having an orifice atone end, a bush'ing: adapted toseat in said orifice with lateralfplay and means forL maintaining said bushing in vsaidorifice, a rocker washer encirclingrsaidfbushing aboveV said orifice whereby the lateral-'movement of said bushing is enhanced :to aid alignment'of said barrel *inv said bushing.

10. A syringe comprising-;a`holder, a pump barrel in said holder, -bu'shingbored 'to receive the` nipple ofsaid barrel and atthe other end 1adapted to` secure a needle',` means permitting lateral play of saidt bushingwhereby to aid alignmen'tfo-fthef saine with said nip-ple, Ysaid means comprising a rocker washer mounted upon said bushing. and 'means for holding-the samein place-thereon;

In testimony whereof, I'affix my signature:

WILLARD HARRIS' BRGCKWAY. 

